A student states: 'Radio waves and gamma rays are both types of electromagnetic radiation, but they are very different from each other.' Explain two ways in which radio waves and gamma rays differ from each other within the electromagnetic spectrum.

Eduqas GCSE Physics — 6.1 Frequency range of the spectrum · Explain · 4 marks · View as Markdown

Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).

Model answer (4 marks)

1. Radio waves have a lower frequency than gamma rays.
2. Radio waves have a longer wavelength than gamma rays.
3. Gamma rays carry more energy than radio waves.
4. Both travel at the same speed in a vacuum (the speed of light).

Examiner tips

  • Use the word "frequency" and "wavelength" to show understanding of the spectrum; include the energy comparison; remember to state the common speed.
  • Structure answer with numbered points matching the marks; keep sentences concise and use correct terminology.

Common mistakes

  • Confusing frequency with wavelength (e.g. saying radio waves have higher frequency); forgetting to mention the energy difference; stating that gamma rays travel slower than radio waves; using vague phrases like "different" without specifics.

Mark scheme (4 marks)

  1. Radio waves have a lower frequency than gamma rays
  2. Radio waves have a longer wavelength than gamma rays (or gamma rays have a shorter/smaller wavelength)
  3. Gamma rays carry more energy than radio waves
  4. Despite these differences, both travel at the same speed in a vacuum / both travel at the speed of light

Key terms in this question

electromagnetic spectrum · gamma rays · radio waves

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